All collectibles items and equipment collected, as well as performed all the stunts. There are two slots in total. In the first one, the game is 100% done (except for mini-games). In the second - the begining of the game, but the entire map is open and all equipment and cosmetics are immediately available.
Copy to C:\Users\<user name>\AppData\Local\Goat2\Saved\SaveGame
Game Version: Patch 220.127.116.11, Build: 239963